Because the cryptogamic crust and the unique microclimate are irreplaceable, the Zachary Cracks were designated a Research Natural Area (RNA) in 2021. The primary threats are trampling (foot traffic compresses the soil crust, killing it) and graffiti (the polished walls are tempting for vandals).
Zachary Cracks, geological mechanism, freeze-thaw jacking, polished fissures, crack-seal veining, Selway-Bitterroot Wilderness, cryptogamic crust, whispering gallery effect, seasonal breathing. Zachary Cracks
: A follow-up article discussing the advantages of the system after two months of exclusive use. 2. Engineering: Crack Propagation Research by Zachary Kral Zachary Kral Because the cryptogamic crust and the unique microclimate